On Sunday, May 05, 2013 1:03 PM soroosh sardari wrote: > Hi > I'm trying to add a new constraint to column constraint. > I add a new keyword ro kwlist.h and gram.y, and also edit ColConstraintElem. > The problem is i don't know what is "Keyword category lists" at the end of gram.y.
Keyword category lists are to distinguish different type of keywords. For example, if you add keyword in reserved_keyword, then you cannot use that as variable in SQL where as if you put in unreserved_keyword, then you can use it. > when I added the new keyword in "unreserved_keyword", shift/reduce and reduce/reduce conflicts appear in bison outputs. > any idea about this problem and meaning of "Keyword category lists" is appreciated. This means the grammar syntax you have defined for ColConstraintElem conflicts with some already existing definition. shift/reduce conflicts can occur due to your changes in ColConstraintElem definition. I suggest first you can try with minimal/dummy changes in ColConstraintElem and once it passes then you can try with your actual changes to see what part of changes cause conflicts. With Regards, Amit Kapila. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
